#!/usr/bin/env node

const fs = require ('fs');
const file = process.argv[2]||__filename;
const rs = fs.createReadStream(file);
if(!fs.existsSync(file)){
  console.error('%s not exist!',file);
  process.exit(1);
}
if(!fs.statSync(file).isFile()){
  console.error('%s is not file!',file);
  process.exit(2);
}
rs.on('error',(e)=>{
  console.error(e.message);
});
rs.pipe(process.stdout);
